projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * $Id: setup.c,v 1.5 2004/03/16 00:07:50 lethal Exp $ | |
| 3 | * Copyright (C) 2000 YAEGASHI Takeshi | |
| 4 | * Hitachi HD64461 companion chip support | |
| 5 | */ | |
| 6 | ||
| 7 | #include <linux/config.h> | |
| 8 | #include <linux/sched.h> | |
| 9 | #include <linux/module.h> | |
| 10 | #include <linux/kernel.h> | |
| 11 | #include <linux/param.h> | |
| 12 | #include <linux/interrupt.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/irq.h> | |
| 15 | ||
| 16 | #include <asm/io.h> | |
| 17 | #include <asm/irq.h> | |
| 18 | ||
| 19 | #include <asm/hd64461/hd64461.h> | |
| 20 | ||
| 21 | static void disable_hd64461_irq(unsigned int irq) | |
| 22 | { | |
| 23 | unsigned long flags; | |
| 24 | unsigned short nimr; | |
| 25 | unsigned short mask = 1 << (irq - HD64461_IRQBASE); | |
| 26 | ||
| 27 | local_irq_save(flags); | |
| 28 | nimr = inw(HD64461_NIMR); | |
| 29 | nimr |= mask; | |
| 30 | outw(nimr, HD64461_NIMR); | |
| 31 | local_irq_restore(flags); | |
| 32 | } | |
| 33 | ||
| 34 | static void enable_hd64461_irq(unsigned int irq) | |
| 35 | { | |
| 36 | unsigned long flags; | |
| 37 | unsigned short nimr; | |
| 38 | unsigned short mask = 1 << (irq - HD64461_IRQBASE); | |
| 39 | ||
| 40 | local_irq_save(flags); | |
| 41 | nimr = inw(HD64461_NIMR); | |
| 42 | nimr &= ~mask; | |
| 43 | outw(nimr, HD64461_NIMR); | |
| 44 | local_irq_restore(flags); | |
| 45 | } | |
| 46 | ||
| 47 | static void mask_and_ack_hd64461(unsigned int irq) | |
| 48 | { | |
| 49 | disable_hd64461_irq(irq); | |
| 50 | #ifdef CONFIG_HD64461_ENABLER | |
| 51 | if (irq == HD64461_IRQBASE + 13) | |
| 52 | outb(0x00, HD64461_PCC1CSCR); | |
| 53 | #endif | |
| 54 | } | |
| 55 | ||
| 56 | static void end_hd64461_irq(unsigned int irq) | |
| 57 | { | |
| 58 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) | |
| 59 | enable_hd64461_irq(irq); | |
| 60 | } | |
| 61 | ||
| 62 | static unsigned int startup_hd64461_irq(unsigned int irq) | |
| 63 | { | |
| 64 | enable_hd64461_irq(irq); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static void shutdown_hd64461_irq(unsigned int irq) | |
| 69 | { | |
| 70 | disable_hd64461_irq(irq); | |
| 71 | } | |
| 72 | ||
| 73 | static struct hw_interrupt_type hd64461_irq_type = { | |
| 74 | .typename = "HD64461-IRQ", | |
| 75 | .startup = startup_hd64461_irq, | |
| 76 | .shutdown = shutdown_hd64461_irq, | |
| 77 | .enable = enable_hd64461_irq, | |
| 78 | .disable = disable_hd64461_irq, | |
| 79 | .ack = mask_and_ack_hd64461, | |
| 80 | .end = end_hd64461_irq, | |
| 81 | }; | |
| 82 | ||
| 83 | static irqreturn_t hd64461_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
| 84 | { | |
| 85 | printk(KERN_INFO | |
| 86 | "HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n", | |
| 87 | inw(HD64461_NIRR), inw(HD64461_NIMR)); | |
| 88 | ||
| 89 | return IRQ_NONE; | |
| 90 | } | |
| 91 | ||
| 92 | static struct { | |
| 93 | int (*func) (int, void *); | |
| 94 | void *dev; | |
| 95 | } hd64461_demux[HD64461_IRQ_NUM]; | |
| 96 | ||
| 97 | void hd64461_register_irq_demux(int irq, | |
| 98 | int (*demux) (int irq, void *dev), void *dev) | |
| 99 | { | |
| 100 | hd64461_demux[irq - HD64461_IRQBASE].func = demux; | |
| 101 | hd64461_demux[irq - HD64461_IRQBASE].dev = dev; | |
| 102 | } | |
| 103 | ||
| 104 | EXPORT_SYMBOL(hd64461_register_irq_demux); | |
| 105 | ||
| 106 | void hd64461_unregister_irq_demux(int irq) | |
| 107 | { | |
| 108 | hd64461_demux[irq - HD64461_IRQBASE].func = 0; | |
| 109 | } | |
| 110 | ||
| 111 | EXPORT_SYMBOL(hd64461_unregister_irq_demux); | |
| 112 | ||
| 113 | int hd64461_irq_demux(int irq) | |
| 114 | { | |
| 115 | if (irq == CONFIG_HD64461_IRQ) { | |
| 116 | unsigned short bit; | |
| 117 | unsigned short nirr = inw(HD64461_NIRR); | |
| 118 | unsigned short nimr = inw(HD64461_NIMR); | |
| 119 | int i; | |
| 120 | ||
| 121 | nirr &= ~nimr; | |
| 122 | for (bit = 1, i = 0; i < 16; bit <<= 1, i++) | |
| 123 | if (nirr & bit) | |
| 124 | break; | |
| 125 | if (i == 16) | |
| 126 | irq = CONFIG_HD64461_IRQ; | |
| 127 | else { | |
| 128 | irq = HD64461_IRQBASE + i; | |
| 129 | if (hd64461_demux[i].func != 0) { | |
| 130 | irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev); | |
| 131 | } | |
| 132 | } | |
| 133 | } | |
| 134 | return __irq_demux(irq); | |
| 135 | } | |
| 136 | ||
| 137 | static struct irqaction irq0 = { hd64461_interrupt, SA_INTERRUPT, CPU_MASK_NONE, "HD64461", NULL, NULL }; | |
| 138 | ||
| 139 | int __init setup_hd64461(void) | |
| 140 | { | |
| 141 | int i; | |
| 142 | ||
| 143 | if (!MACH_HD64461) | |
| 144 | return 0; | |
| 145 | ||
| 146 | printk(KERN_INFO | |
| 147 | "HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n", | |
| 148 | CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE, | |
| 149 | HD64461_IRQBASE + 15); | |
| 150 | ||
| 151 | #if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */ | |
| 152 | outw(0x2240, INTC_ICR1); | |
| 153 | #endif | |
| 154 | outw(0xffff, HD64461_NIMR); | |
| 155 | ||
| 156 | for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) { | |
| 157 | irq_desc[i].handler = &hd64461_irq_type; | |
| 158 | } | |
| 159 | ||
| 160 | setup_irq(CONFIG_HD64461_IRQ, &irq0); | |
| 161 | ||
| 162 | #ifdef CONFIG_HD64461_ENABLER | |
| 163 | printk(KERN_INFO "HD64461: enabling PCMCIA devices\n"); | |
| 164 | outb(0x4c, HD64461_PCC1CSCIER); | |
| 165 | outb(0x00, HD64461_PCC1CSCR); | |
| 166 | #endif | |
| 167 | ||
| 168 | return 0; | |
| 169 | } | |
| 170 | ||
| 171 | module_init(setup_hd64461); |